#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include<ctype.h>
int main() {
    char ch;
    while (~scanf("%c\n", &ch))
    {
        if (isalpha(ch))
        {
            printf("%c is an alphabet.\n", ch);
        }
        else
        {
            printf("%c is not an alphabet.\n", ch);
        }
    }
    return 0;
}